Means for cooling shafts



2 SHEETS-SHEET I H. J. -STEHLI MEANS FOR CooLlN SHAFTs. Fuso usc. l0. i921 U'fA/IM/ ATTORNEY VH. J. sTEHLl.. MEANS ,FOR CooLlNs SHAFTs. FILED oec l0 |921 2 sHEeTs-sHEET 2 ,JI/NVENT'OR BY o\ $0 63 ATTORNEY A specification.

hollow or tubular shaft with cooling fluid thereto,

shaft embodying my invention;

. conduit to admit water or Pstented Dec. 13,1922.

UNET ST fiss HENRY J'. STEHLI, OIE CEDAR GROVE,v NEW JERSEY, ASSIGNOR T0 SINTERINGr- MACHINERY CORPORATION, OF MOUNT OLIVE TOWNSHIP, NEW JERSEY, A

'ORPORATION OF NEW JERSEY.

MEANS non COOLING snnr'rs.

To all whom 'it may concern.'

Be it known that I, HENRY J. STEHLI, a citizen of the Unitedv States, and resident of Cedar Grove, in the county of Essex and State of New Jersey, have invented certain new and useful Improvements in Means for Cooling Shafts, of whichjthe following is a Rotative shafts used in various kinds o f machinery are liable to become heated and injure their bearings. Shafts used for rotating fans or blowers that suck or blow hot air and hot gases are particularly liable to become heated andinjure their bearings by reason of the transmitted heat. The object of my invention is to provide means to keep the aforesaid shafts relatively cool so as not to overheat or injure bearings forsaid shafts.

In carrying out my invention I provide a means toadmit such as water, and means to maintain circulation of such fluid through the shaft during its rotation.

1n the accompanying drawings I have illustrated a hollow shaft with means to admit cooling fluid to its bore, saidshaft having outlets from said bore, and means to receive fluid from said-outlets.

My invention also comprises novel details of improvement that will be more fully here.- i-nafter set forth and then pointed out vin the claims.

Reference is to be had to the accompanying drawings forming part hereof, where- Figure 1 isa longitudinal section of a Fig. 2 is an enlarged partly sectional detail; i

Fig. 3 is a cross section substantially on line 3, 3, in Fig. 2, and

Fig.4 is a sectional tion.

Similar numerals of reference indicate corresponding parts in the several views.

' The shaft 1 is hollow or tubular and may be supported to rotate in any suitable bearings 2. The bore 1L of said shaft mayextend partly through the same, as shown 1n Fig. 1, or inay extend entirel as shown in Fig. 4. At 3 View of a modificais an inlet pipe or other cooling Huid to bore 1a. In the forni shown in Figs.

I tending from the through the shaft,

SerialNo. 521,407'.4

l, 2, and 3, |the pipe extends within bore 1a of the shaftfrom one end and terminates adjacent to the inner end of said bore, said pipe being smaller than bore 1a so that fluid delivered into said bore adjacent to its closed end may flow aroundsaid pipe, through said bore, and'find exit through its open end 1b. Shaft 1 at the eXit end for the fluid is provided with a closure or cap 4, which may be secured at'the end ofthe shaft by screws 5 or in any other suitable manner. Said closure or cap is shown provided with a chamber or cavity 4a communicating with one or more outlets 4b radially disposed and shown in the form of short radial tubes eX'- cap and communicating Cap 4, in Figs. 1, 2, 3, is with a bore or bearings .6

with chamber 4a. shown provided receiving pipe 3 to rotate thereon, by preference a bushing '7 being provided between said cap and pipe to make a fluid tight rotary fit. Pipe 3 is shown provided with bearings 8 within bore .1a and supported outside of cap 4 by bracket 9- on frame 10. Pipe 3 may be secured to bracket 9 by 11, or in any other desired manner. The outlets4b are enclosed within a housing 12 within which the cap and outlets may rotate tocollect fluid issuing from said outlets, which housing is shown supported upon frame 10. A drain pipe 13 'is shown connected with housing 12 to conduct fluid from vsaid housing.

Iii Fig. 4 the pipe or conduit 3. is shown supported upon a bracket 14 0n frame 10 and may be retained thereon by set screw 15, which conduit opens` through a cap 16 secured, as by; screws 17, to the adjacent open end of s aft 1 to deliver fluid to bore 1a thereof. At the opposite end of shaft 1 closure or cap 4 is applied, its outlets 4" being within housing 12 in manner before explained. The cavity 4a of cap 4 is shown closed in Fig. 4, at its outer wall, since pipe 3 does not Vpass through said cap in such construction.

Shaft .1 may be rotated in any desired manner. such as by means of a coupling 1S (Fig. 1) to be attached to a blower, fan, pump or other part, which may drive or be driven by said shaft, or said shaft may be provided with a pulley, indicated at 19 (Fig. 4), or a gear.

During rotation of shaft 1 cooling Huid,

screw4 los such as water, will be delivered into bore 1a through pipe 3 and will circulate through said bore, finding its exit through one or more outlets 4b into housing 12, whence the fluid will floW through drain pipe 13, such fluid serving in-its flow through the shaft to keep the same cooled to such an extent that the shaft will not injure its bearings 2. Since the outlet or outlets 4J are radially disposed respecting the axis of shaft 1 the iiuid Will be thrown off centrifugally at the outlets, inducing exhaust in bore 1a of the rotating shaft, tending to suck-or draw the fluid from bore 1a with relation to the rotative speed of the shaft -irrespective of the hydrostatic pressure on the fluid entering the shaft through inlet pipe or conduit 3 and thereby effecting circulation of the Huid, as desired, through bore la. l

My invention is particularly useful in connection with shafts liable to be heated, particularly by radiation or conduction from a part coupled to or driven by or with the shaft, such as a rot-ary fan or blades of a blower, used for sucking or blowing heatedv gases, air and the like, or means for pumping heated fluids.

Having now described my invention, what I claim is 1. The combination of a hollow shaft, stationary means to admit fluid thereto, said shaft having one or more radially disposed outlets rotative with`the shaft and communicating with its bore to receive flow of Wationary means to admit Huid 'to the shaft,

a closure for the bore of said shaft rotative therewith and provided with one or more radial outlets communicating with said bore, and means to collect fluid flowing from the outlet. y

3. The combination of a hollow shaft, stationary means to admit fluid adjacent to one end of the bore of the shaft, a closure at the opposite end of said bore rotative with the shaft and having one or more radial outlets, communicating with said bore` and means to collect fluid issuing from the outlets. i

4Q The combination of a hollow shaft, stationary means to admit Huid adjacent to one end of the bore of the shaft, a closure at the opposite end of .said bore rotative with the shaft and having one o'r more raand a housing inclosing said closure and outlet to` collect fluid issuing from the outlet, and means to drain fluid from the housin n The combination of a hollow shaft having one end of its bore closed and one endopen, a stationary pipe extending into said bore and vterminating adjacent to its inner closed end to deliver cooling fluid into said bore, a closure secured at the open end of the shaft communicating with said bore, said closure rotatively receiving said pipe and having 011e or more outlets communieating with said bore.

v6. The combination of a hollow shaft having one end of its bore closed and one end open, a. stationary pipe extending into said bore and terminating adjacent to its inner closed endto deliver cooling fluid into said bore, a closure receiving said pipe, said closure being rotative with the shaft and having one or more radial outlets communicating with said bore, and means to collect fluid issuing from said outlet.

7. '.lhe combination of a shaft having a bore closed at one end and open at the other end', a stationary pipe within the bore terminating near its closed end to deliver cooling fluid into said bore, said pipe having one or more bearings within said bore, a closure for said bore secured to the shaft and rotatively receiving said pipe and having a cavity communicatmg with said bore, sald closure having one or more outlets communicating with sald cavity.

8. The combination of a shaft havino a bore closed at one end and open at the other end, a stationary pipe within the bore terminating near its Aclosed end t0 deliver cooling fluid into said bore, said pipe having one or HENRY J. STEHLI. 

